The development of conceptual understanding, procedural fluency, and problem solving in mathematics are of great importance in the Lower School curriculum. In each grade, students are exposed to all five mathematical strands: Number Sense and Operations, Algebra, Geometry, Measurement, and Statistics and Probability.

Children are involved in daily problem-based learning, making meaningful connections between the strands and different skills so that they can better learn and understand mathematical practices and principles.

In the primary grades students are introduced to concepts through the use of manipulatives  and other mathematical models.

Computation skills using the four operations are begun and expanded as students move from Kinder 3 to grade 5. By second grade, students can add and subtract multi-digit numbers. Multiplication and division are introduced in third grade. In grades 4 and 5 students are expected to apply knowledge of the four operations to fractions and decimals.